Final answer:
Gender identity is not a factor in determining the biological sex of a person, instead, it is a personal sense of one's own gender.
Step-by-step explanation:
The term that is NOT a factor in determining the biological sex of a person is c) Gender identity. Biological sex is typically determined by a combination of genetic, gonadal, and hormonal factors. These include chromosomes (such as the presence of XY or XX sex chromosomes), gonads (ovaries or testes), and hormones (like testosterone and estrogen) that direct the development of secondary sex characteristics. However, gender identity is a person's internal, personal sense of their own gender, which may or may not correspond with the sex they were assigned at birth.